Combination door-lock.



No. 876,550. PATENT-ED JAN 14, 1908..

B. J. HOFHEINZD COMBINATION DOOR'LOOK.

APPLIGATION FILED 13110.12, 1906.

2 SHEETS-SHEET '1.

Z N I E H P 0 H um COMBINATION DOOR LOOK.

APPLIOATION FILED DEO.12. 1906.

2 SHEETS-SHEET 2.

.at the face plate end, t

-- BRUNO J. HOFHEINZ, OF LOS ANGELES, CALIFORNIA.

comma'rron noon-Loon.

Specification of Letters Patent.

Patented Jan. 1908.-

Application filed December 12, 1906- Serial No. 347.556-

To all whom it may concern:

Be it known that I, BRUNO J. HOFHEINZ, acitizen of the'United. States, residing at Los An eles, in the county of Los Angeles, State of alifornia, have invented a new and useful Combination Door-Lock, of which the follow ingris a specification. 7

he main object of vide a keyless or combination door lock particularly adapted for use in stores and in other places.

A further object of the invention is to pro- 'vide a lock of this character which will provide for a large number of combinations and therefore comparative safety with a minimumnumher of parts.

The accompanying drawings illustrate the invention I Figure 1 is a front elevation of the lock. Fig. 2 is a vertical section in the plane just outside of the operating tumbler. Fig. 3 is a vertical section on the axis of the lock. Fig. 4 is a perspective view of the main or operating tumbler and adjacent parts. Fig. 5 is a view showing in side elevation the three tumblersseparated to show the relative angular position thereof when the first tumbler only as been moved to unlocking position. i Fig. 6 is a similar view showing the position of the tumblers when the second tumbler has been brought to unlocking position. Fig. 7 is a front elevation of an index dial formed with a hinged cover. Fig. 8 is a side elevation of the dial showing part of the door in section and showing the cover late in section and in 0 en position. Fig; 9 1s a detail perspective il ustrating theattachment of the face plate.

The lock comprises a case formed as a rec tangular box member 1 open on one side and e said side being closed by a cap plate 2 and the said end being closed by a face plate 3 which is securedto the case 1 by upset ribs or projections 4, which extend through transverse slots 46 in flanges 40 extending from the box shaped member 1.

5 designates the bolt, having arms 6, sliding on rods 7 extending inwardly from theface plate, said bolt being retracted by springs 8 which surround said rods and engage said arms. Said bolt has a projection 9 to beengaged and operated by the tumbler means 17 hereinafter described, said projection having a slot or opening 10, forming a bridge 47 at the outer end thereof. The case 1 and cap plate 2 are provided with .s ring this invention is to pro 17 is carried by are held from turning by means of keys 12. These sleeves serve as non-rotative bearings 0r su orts for the two outer tumblers 13, 14 w 1ch are frictionally held thereon by IDS 15 therein pressed against the sleeve 9 y s rings 16. The central or operating tumb er 17 extends and works between the outer tumblers 13, 14 the said tumblers 13, 17, 14 being mounted end to end in close order or in direct contact and said tumbler a hub 18 secured to or enga ing with the spindle or arbor 19 of the loc in such manner that when the arbor is turned by its knob 20 or by othermeans, it will operate this central tumbler. The operating arbor 19 is preferably formed with an an 1e or ridge 21 alongone edge and is provi ed with index arms or points 22, 23 which, in the rotation of the arbor, pass over the faces of the dials 24, 25 on the inner and outer sides of the door, said dials being suitably marked as hereinafter described, to

enable the lock to be operated by any one knowing the combination. The index device 22 is or may be exposed at the inner side of the door and is provided with a manual operating means 27, for example, a pin, on the index arm and having a portion ,to be grasped by the fingers. At the outside of the door the handle is operated by the knob 20 aforesaid.

The tumblers 13, 14, 17- are provided with interengaging means for controlling the operation of the tumblers in unlocking the lock. For this purpose each of the outer tumblers has an annular groove 28 in its face next to the central tumbler. In the said groove of the outer tumbler 13 are secured two pins or projections 30,31. In the annular groove 28 of the other outer tumbler 14 is secured a fixed pin or projection 32, and there also are provided in said .groove a series of threaded holes 34 for the reception of a shiftable screw pin or projecting meme ber 35, these holes being spaced apart in definite order and representing a certain fraction of one revolution of the operating arbor. Each of the tumblers 13, 14, has a slot or notch 33 extending radially inward to form a passageway for the reception of the projection 9' on the bolt when such tumblersv are'brou ht to such unlocked position. The central tumbler has two pins 36, 37, respectively on opposite sides working in the brake means conslsting of pressure holes for the reception of sleeves 11 which the original direction until the third number grooves 28 of the respective outer tumblers and adapted to engage the respective pins on said outer tumblers. Said central tumbler also has a slot 38 extending inward in an obliquely inclined direction to receive and operate the projection 9 of the bolt when the latter has been forced into the slots in the tumblers by means of the bolt retracting springs, as hereinafter described, the 0 ening 10 of projection 9 enabling the turn ler 17 to move into it, and enabling the bridge 47 to work down into the slot 38. i

The dials 24, 25 are marked in circular i order with graduations-or divisions 44 corl responding to definite fractions of a circumference, for example 65 divisions, and l indicated by numbers, and at certain intervals around the dials are laced other} marks, indicated for exam le by letters as I shown at 45, the distance etween the sucj cessive letter marks representing a multiple l of the distance between the successive number marks. The letter marks are the starting oints used in setting or resetting the 5 com ination originally, and the numbered marks are used in setting and also in un looking the lock. At one or both sides of j the door or lock, the indicating dial may be i provided with a cover consisting of a shell'42 inged to the dial at 43 so as to be capable of I being lifted or turned up, disclosing the inl ternal dial, and in this form a short shaft 48 is'used, taking the place of the hub of the knob.

The 0 eration is as follows:Assuming that the ock is in locked position and that it is desired to open the same, the knob or handle 20 is turned 'two or more times to the right, thereby gathering the several tumblers by means of the pins on said tumblers, and when the tumblers have all been picked up in this manner, which will be the case a ter four revolutions, this rotation is stopped when the index arm points to the first number of the combination. This operation leaves the slot 33 in the tumbler 13 opposite to or in register with the projection .9 of the bolt. Pin 37 on tumbler 17 is in contact with pin 30 of tumbler 13 and'pin 36 of tumbler 17 is in contact with pin 32 of tumbler 14. The rotation is then reversed, the index arm being turned back to the next .sons, the arbor 19 preferabl number of the combination, the pin 36 on the central tumbler then engaging with the pin 35 on the tumbler 14 to turn the same along with the central tumbler, and when the index arm is brought to the second number of the combination the slot 33 in this tumbler 14 will be in re ter with the projection 9 of the bolt. The ob may then be turned in of the combination is reached, whereupon the outer end of the slot 38 in the central tumbler will "be in register with the pro ection 9 of the bolt, and the bolt springs 8 will tumbler 17 serving in this retraction to positively engage and retract the bolt in case the spring should fail to work to full extent. In

the opposite motion of the knob this oblique slot 38 protracts the bolt and then by further operation of the knob. in the usual manner the tumblers are disordered and the device thereby locked. It will be noted that in this device there are only three tumblers, but there are four rotative movements, thereby obtaining additional security, for if an unauthorized party were attempting to open the lock he would not be able to do so unless he sto ped the device just when the outer end of t e slot 38 is brought into register with the bolt projection. If he should turn the knob further the device would be locked and could not be unlocked without beginning the whole operation anew. The indicators on the dial are numbered in reverse direction on opposite sides so as to correspond to the same rotative direction.

The setting of the combination or the re setting thereof is effected by moving the shiftable pin .35 into any one of the series of holes 34 in the tumbler 14, thus determining the movement that is to be made in the operation of the tumbler 17 from a given point. This in itself will give but few combinations, but a large increase in the number of combinations to be obtained is effected by securing the index arms by a screw 51 to the shaft 48 on the arbor, enabling it to be adjusted to any one of the series of lettered starting points, the initial tumbler 13 being at that time set with I the slot directed toward a definite point, for example toward the bolt. As anaid in setting the combination or in finding the combination by authorized perhas one side formed with an edge or ang e 21, as aforesaid, serving as an indicator, this form of arbor also serving to carry with the arbor in its rotation, the operating member 17 which is formed'with an opening to fit the arbor. The end of the arbor is covered by a threaded screw 50 which normally conceals the indicating edge, thus safeguarding the lock. The knob is fastened by a screw 53 concealed by the hub of the index arm. The center of the indicating dial is cupped in as at 52 to hold the knob-hub or axle 49. for receivin the screw 53 should be provided at eac end of the arbor or spindle, to enable the end to be screwed on in this man'- inwardly extending slot, and a bolt mounted ner. The cover plate serves also as a push plate for the door, particularly when the device is used on a double acting door, the

cover plate being thus provided at both sides.

the slots of the tumblers, and dial and in- What I claim is 1. A door lock comprising an operating j dex means to indicate the angular position of the lock spindle, one of the operated spindle, an operating tumbler carried byj I said spindle and having projections on optumblers having one of its projections adto change the posite sides, said tumbler also having an justably mounted thereon obliquely inwardly extending slot, a tumangular position thereof. bler rotatably mounted on each side of said j 5. In a combination door lock, three operating tumbler, and having a radially inwardly extending slot, and a bolt mounted to move radially to and from the spindle and having a projection to engage and work in operating tumbler and provided with pro tumblers mounted in close order end to end, jections to engage the projections of the and separate supporting arbors for said operating tumblers, the arbors for the two outer tumblers having flanges for holding the tumblers together.

6. In a combination door lock, three tumblers mounted end to end, and separate supporting arbors for said tumblers, and spring brake means frictionally resisting movement of two of the tumblers.

7 In a combination lock, an operating tumbler having an oblique slot, and tumblers operated by the operatin tumbler and each having a radial slot, a olt having a portion directly engaging said tumblers to enter the slots therein, and spring means for pressing the bolt against the tumblers.

8. A combination door lock comprising an operating tumbler having an obli ue slot and two tumblers operated by sai operatin tumbler and having radial slots, said tum lers having projections to control the o erated tumblers from the operating tumber, and a bolt pressing against t e tumblers, whereby alternate operation of the operating tumbler in opposite directions brings the operated tum ers and the operating tumbler into position with the slots opposite the engaging portion of the bolt, and then, by again reversing the motion, retracts the bolt by operation of the oblique slot in the operating tumbler.

9. A lock case having its face member rovided with two inwardly extending rods, a bolt having arms slidably engaging the said rods, and s rings surrounding the rods and enga ing t e arms of the bolt to retract the olt.

In testimony whereof, I have hereunto set my hand at Los Angeles,-California, this 3rd day of December, 1906.

BRUNO J. HOFHEINZ.

In presence of- ARTHUR P. Kmenr, FRANK L. A. GRAHAM.

tumbler, and having a radially to move radially to and from the spindle and having a projection to engage and work in the slots of the tumblers.

2. A door lock comprisin an operating spindle, an operating tumb er carried by said spindle and having projections on opposite sides, said tumbler also having an obliquely inwardly extending slot, a tumbler rotatably mounted on each side of said operating tumbler and provided with projections to engage the projections of the operating tumbler, and having a radially inwardly extending slot, and a bolt mounted to move radially to and from the spindle and having a projection to engage and work in the slots of the tumblers, and spring means for pressing the bolt to force its projection into said slots, the projection of the bolt having a bridge portion to work in the slot of the operating tumbler.

3. A door lock comprising an operating spindle, an operating tumbler carried by said spindle and having projections on opposite sides, said tumbler also having an obliquely inwardly extending slot, a tumbler rotatably mounted on each side of said operating tumbler and provided with projectlons to engage the projections of the operating tumbler, and having a radially inwardly extending slot, and a bolt mounted to move radially to and from the spindle and having a projection to engage and work in the slots of the tumblers, and dial and index means to indicate the angular position of the lock spindle.

4. A door lock comprising an operating spindle, an operating tumbler carried by said spindle and having projections on opposite sides, said tumbler also having an obliquely inwardly extending slot, a tumbler rotatably mounted on each side of said operating tumbler and provided with projections to engage the projections of the provided with means for 

